The Trump administration has directed key US software firms to halt services to Chinese chip designers, according to the Financial Times. The Commerce Department’s Bureau of Industry and Security reportedly issued the order to major Electronic Design Automation (EDA) companies — including Synopsys ($SNPS), Cadence ($CDNS), and Siemens EDA — instructing them to stop supplying their software tools to Chinese clients.

These three firms collectively control approximately 80% of China’s chip design market, making the move a significant escalation in the ongoing US-China tech tensions.

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